Controlled transition to different proton acceleration regimes: Near-critical-density plasmas driven by circularly polarized few-cycle pulses

De Marco Shivani Choudhary; Mondal Sudipta; Margarone Daniele; Kahaly Subhendu

doi:10.1063/5.0151751

Volume 8 Issue 5

Sep. 2023

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De Marco Shivani Choudhary, Mondal Sudipta, Margarone Daniele, Kahaly Subhendu. Controlled transition to different proton acceleration regimes: Near-critical-density plasmas driven by circularly polarized few-cycle pulses[J]. Matter and Radiation at Extremes, 2023, 8(5): 054001. doi: 10.1063/5.0151751

Citation:

De Marco Shivani Choudhary, Mondal Sudipta, Margarone Daniele, Kahaly Subhendu. Controlled transition to different proton acceleration regimes: Near-critical-density plasmas driven by circularly polarized few-cycle pulses[J]. Matter and Radiation at Extremes, 2023, 8(5): 054001. doi: 10.1063/5.0151751

Citation:

De Marco Shivani Choudhary, Mondal Sudipta, Margarone Daniele, Kahaly Subhendu. Controlled transition to different proton acceleration regimes: Near-critical-density plasmas driven by circularly polarized few-cycle pulses[J]. Matter and Radiation at Extremes, 2023, 8(5): 054001. doi: 10.1063/5.0151751

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Controlled transition to different proton acceleration regimes: Near-critical-density plasmas driven by circularly polarized few-cycle pulses

doi: 10.1063/5.0151751

1.
ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3, Szeged 6728, Hungary
2.
ELI Beamlines Center, Institute of Physics, Czech Academy of Sciences, Za Radnicí 835, 252-41 Dolní Břežany, Czech Republic
3.
Institute of Physics, University of Szeged, Dóm tér 9, H-6720 Szeged, Hungary

More Information

Corresponding author: a)Author to whom correspondence should be addressed: subhendu.kahaly@eli-alps.hu
Received Date: 2023-03-24
Accepted Date: 2023-07-04

Available Online: 2023-09-01

Publish Date: 2023-09-01

Abstract

Abstract

A controlled transition between two different ion acceleration mechanisms would pave the way to achieving different ion energies and spectral features within the same experimental set up, depending on the region of operation. Based on numerical simulations conducted over a wide range of experimentally achievable parameter space, reported here is a comprehensive investigation of the different facets of ion acceleration by relativistically intense circularly polarized laser pulses interacting with thin near-critical-density plasma targets. The results show that the plasma thickness, exponential density gradient, and laser frequency chirp can be controlled to switch the interaction from the transparent operating regime to the opaque one, thereby enabling the choice of a Maxwellian-like ion energy distribution with a cutoff energy in the relativistically transparent regime or a quasi-monoenergetic spectrum in the opaque regime. Next, it is established that a multispecies target configuration can be used effectively for optimal generation of quasi-monoenergetic ion bunches of a desired species. Finally, the feasibility is demonstrated for generating monoenergetic proton beams with energy peak at E≈20–40 MeV and a narrow energy spread of ΔE/E≈18%–28.6% confined within a divergence angle of ∼175 mrad at a reasonable laser peak intensity of I₀ ≃ 5.4 × 10²⁰ W/cm².

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References(86)

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